Bradley arrived in country on Veteran’s Day, 1970 and would spend exactly 365 days there. He and Werner, a professor at the University of Wisconsin, interviewed hundreds of Bradley’s fellow veterans to find out which songs impacted them most during their time in Vietnam — and stayed with them after.

While many of the vets were tight-lipped with their combat experiences, they were very forthcoming about their musical recollections. Nancy Sinatra’s “These Boots Are Made for Walkin’,” “My Girl” by the Temptations, Blood Sweat and Tears’ “And When I Die,” “Ring of Fire” by Johnny Cash, and, for Bradley himself, Smokey Robinson and the Miracles’ “Tears of a Clown.”

The authors compiled the Vietnam generation of veterans’ favorite songs into a reflection of how the music affected the troops who fought there and how it affects them to this day.